[Kingdom] Animalia Linnaeus, 1758 - animals
   Grade Enterozoa
     Grade Cœlomata
       Phylum Vertebrata (Lamarck, 1801)
         Branch Craniata Linnaeus, 1758
           Grade Gnathostoma
             Subgrade Pentadactyla lipobranchia
               Branch Monocondyla
                 Class Reptilia Linnaeus, 1758 - reptiles
                   Subclass Chelonia Brongniart, 1800 see Class Chelonia Brongniart, 1800
                     1 Genus Chelonia Brongniart, 1800
                     2 Genus Trionyx Geoffroy Saint-Hilaire, 1809
                     3 Genus Emys Duméril, 1805
                     4 Genus Chelys Oppel, 1811 see Genus Chelus Duméril, 1806
                     5 Genus Testudo Linnaeus, 1758